Return-Path: Received: from mx143.netapp.com ([216.240.21.24]:37190 "EHLO mx143.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760592AbbIDURT (ORCPT ); Fri, 4 Sep 2015 16:17:19 -0400 From: Anna Schumaker To: , , , , , , , , , , Subject: [PATCH v1 6/8] vfs: Copy should check len after file open mode Date: Fri, 4 Sep 2015 16:17:00 -0400 Message-ID: <1441397823-1203-7-git-send-email-Anna.Schumaker@Netapp.com> In-Reply-To: <1441397823-1203-1-git-send-email-Anna.Schumaker@Netapp.com> References: <1441397823-1203-1-git-send-email-Anna.Schumaker@Netapp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: I don't think it makes sense to report that a copy succeeded if the files aren't open properly. Signed-off-by: Anna Schumaker --- fs/read_write.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/read_write.c b/fs/read_write.c index 922ca58..59637ed 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1345,9 +1345,6 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in, if (flags) return -EINVAL; - if (len == 0) - return 0; - /* copy_file_range allows full ssize_t len, ignoring MAX_RW_COUNT */ ret = rw_verify_area(READ, file_in, &pos_in, len); if (ret >= 0) @@ -1373,6 +1370,9 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in, if (inode_in == inode_out) return -EINVAL; + if (len == 0) + return 0; + ret = mnt_want_write_file(file_out); if (ret) return ret; -- 2.5.1